Getting Started with PHP Unit Testing Using PHPUnit

Why Unit Testing Matters

Unit testing ensures your PHP code works as expected. PHPUnit is the go-to tool for PHP developers. This guide covers the basics.

Step 1: Install PHPUnit

Install PHPUnit via Composer:

composer require --dev phpunit/phpunit
			

Step 2: Create a Test Case

Create a test file, e.g., tests/CalculatorTest.php:

use PHPUnit\Framework\TestCase;

class CalculatorTest extends TestCase {
    public function testAddition() {
        $calculator = new Calculator();
        $this->assertEquals(4, $calculator->add(2, 2));
    }
}
			

Step 3: Run Tests

Execute tests using:

vendor/bin/phpunit tests
			

Step 4: Write More Tests

Add tests for edge cases and other methods to ensure robust coverage.

Conclusion

PHPUnit makes it easy to write and run tests, improving code quality. Integrate it into your CI/CD pipeline for continuous testing.